b01010101
Junior Member level 1
I saw a warning like "Out of 2774423 SDF statements, 2774423 had null values." Do it mean that the SDF annotation have some problems?
# ** Warning: (vsim-SDF-3924)E:/BMC/asic_top/post_simulation/asic_top_type.sdf: Out of 2774423 SDF statements, 2774423 had null values.
# ** Note: (vsim-3587) SDF Backannotation SuccessfullyCompleted.
Here is part of the sdf file:
(TEMPERATURE 25.00::25.00)
(TIMESCALE 1ns)
(CELL
(CELLTYPE "asic_top")
(INSTANCE)
(DELAY
(ABSOLUTE
(INTERCONNECT si_pad PIW_2/PAD (0.000::0.000))
(INTERCONNECT PX2W_0/XOUT xout_pad (-0.000::-0.000) (-0.000::-0.000))
(INTERCONNECT PIW_0/C IccPlace_2/A (0.000::0.000))
(INTERCONNECT bmc_top0/IccPostcts_3/Y bmc_top0/IccPostcts_1/A (0.000::0.000))
(INTERCONNECT bmc_top0/bmc_noio/U41/Y bmc_top0/bmc_noio/U540/A0 (0.000::0.005) (0.000::0.000))
(INTERCONNECT bmc_top0/bmc_noio/U1109/Y bmc_top0/bmc_noio/U540/A1 (-0.003::0.008) (-0.004::0.007))
(INTERCONNECT bmc_top0/bmc_noio/U96/Y bmc_top0/bmc_noio/U540/B0 (0.003::0.003) (0.003::0.003))
I don't why it says "2774423 had null values." Please help me. Thank you.
# ** Warning: (vsim-SDF-3924)E:/BMC/asic_top/post_simulation/asic_top_type.sdf: Out of 2774423 SDF statements, 2774423 had null values.
# ** Note: (vsim-3587) SDF Backannotation SuccessfullyCompleted.
Here is part of the sdf file:
(TEMPERATURE 25.00::25.00)
(TIMESCALE 1ns)
(CELL
(CELLTYPE "asic_top")
(INSTANCE)
(DELAY
(ABSOLUTE
(INTERCONNECT si_pad PIW_2/PAD (0.000::0.000))
(INTERCONNECT PX2W_0/XOUT xout_pad (-0.000::-0.000) (-0.000::-0.000))
(INTERCONNECT PIW_0/C IccPlace_2/A (0.000::0.000))
(INTERCONNECT bmc_top0/IccPostcts_3/Y bmc_top0/IccPostcts_1/A (0.000::0.000))
(INTERCONNECT bmc_top0/bmc_noio/U41/Y bmc_top0/bmc_noio/U540/A0 (0.000::0.005) (0.000::0.000))
(INTERCONNECT bmc_top0/bmc_noio/U1109/Y bmc_top0/bmc_noio/U540/A1 (-0.003::0.008) (-0.004::0.007))
(INTERCONNECT bmc_top0/bmc_noio/U96/Y bmc_top0/bmc_noio/U540/B0 (0.003::0.003) (0.003::0.003))
I don't why it says "2774423 had null values." Please help me. Thank you.